Motor.



No. 807,529. PATENTED DEC. 19, 1905. G. E. YETMAN.

MOTOR.

APPLICATION FILED FEB.3.1901.

3 SHEETSSHEBT l.

No. 807,529. PATENTED DEC. 19, 1905. U. E. YETMAN.

MOTOR.

APPLICATION FILED FEBJL 1901.

3 SHEETS-SHEET Z i k i No. 807,529. PATENTED DEC. 19, 1905. c. E. YETMAN.

MOTOR.

APPLIGATION FILED FEB. B. 1901.

3 SHEETS-SHEBT 3.

UNITED STATES PATENT OFFICE.

CHARLES E. YETMAN, OF OAK PARK, ILLINOIS, ASSIGNOR TO WORLD FLASH COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

MOTOR.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed February 8, 1901. Serial No. 46,581-

To ctZZ whom it may concern:

Be it known that 1, CHARLES E. YETMAN, a citizen of the United States, and a resident of Oak Park, Cook county, Illinois, have invented certain new and useful Improvements in Motors, of which I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to spring-motors, and has for its object certain improvements in the construction of the same, as will be hereinafter more definitely pointed out and claimed, reference being had to the accompanyingdrawings, in which 4 Figure 1 is a plan view of a motor embodying my invention. Fig. 2 is a horizontal transverse sectional view thereof. Fig. 3 is a vertical section of the speed-controlling device. Fig. 4 is a detail sectional view on line 4 4 of Fig. 3. Figs. 5 and 6 are transverse sectional views on lines 5 5 and 6 6, respectively, of Fig. 1. Fig. 7 is a sectional elevation of the centrifugal governor, and Fig. 8 is a detail view of the ratchet-wheel and pawls.

Any suitable type of sustaining-frame may be employed; butin the drawingsIhave shown the sustaining-frame of the motor and gearing consisting of the vertical plates A, A, and A which are united together at convenient points by the tie-rods a. J ournaled to the frame-plates A and A is the main drive-shaft B. Loosely mounted on shaft B are a series of cup-shaped cells C, C, C and C each of which is provided with a hub c and with a flange c. The hubs of the cells C, O and C extend within the next adjacent cell, and v0- lute springs D connect the flanges of the cells with the hub of the next adjacent cell, as clearly shown in Fig. 2. The spring D, con nected to the flange of cell C is connected at its inner end to the hub c", which is fixed to the shaft B by means of the pin 0 The hub 0" extends through a cap-plate (1* of cell C and carries at its outer end a ratchet-wheel 6. With this ratchet-wheel engages a pawl E, which is held in contact therewith by the spring a. To the hub c of the cell C is attached the primary gear-wheel F, from which motion is communicated through the suitable train of gears to the point where the power of the motor is to be utilized. In the drawings I have shown the gear F meshing with a pinion f, which is connected to a gear-wheel f that in turn meshes with a pinion f From any of these pinions motion may be transmitted as desired to the mechanism to be driven.

B indicates a winding key or handle mounted upon one end of the shaft B, by means of which the several springs D may be wound. When the springs are thus wound and the train of gearing released, the motor will be operated by the uncoiling of the various springs D.

Fixed to the plate A about the shaft f of the gear f is a stationary disk G, provided with an annular projecting flange 9. Mounted to revolve upon the shaft is a smaller disk H, upon which are pivoted the centrifugallyactuated governor-arms I. Secured to the face of the disk H, but spaced therefrom, is a ring K, upon which are pivotally mounted a series of bell-crank levers L. One arm of the bell-crank lever L rests against the cone M,

mounted upon the shaft f", so as to be longitudinally adjustable thereon. Springs N extend between the opposite arms of the bellcranks L and the centrifugally-operated governor-arms I. To the free ends of the governor-arms I are mounted the shoes O, which normally rest in contact with the ,disk H. If, however, the speed of the motor should become excessive, the free ends of the arms I will be thrown outwardly by centrifugal force, and the shoes O will bear against the flange g, which thus forms a friction-surface, and thereby reduces the speed of the motor.

In order to vary the speed of the motor, the adjustable cone M is provided with an adjusting-yoke P, having arms 1) engaging as lot m in the cone M. The opposite end of the yoke P is mounted to slide on a rod 1)", attached to the plate A Secured to the yoke P is the threaded rod 11 which is engaged by the thumb-nutR. The thumb-nut R is mounted in a bearing 9", so as to be secured thereby against longitudinal movement. By this means the position of the cone M on the shaft f is readily varied, and thereby, through the operation of the cone upon the bell-cranks L, the tension of the springs N is adjusted. This device permits the motor to be set to operate at any desired speed, while the automaticallyoperating governor-arms will maintain that speed uniform. This particular arrangement enables the tensions of the springs end to be adjusted for varying the speed of the motor while the motor is in operation.

Mounted on a shaft S and journaled in hearings on the plates A and A is an indicating-wheel 8, adapted to cooperate with a pointer s, fixed to the plate A, to show at a glance the extent to which the spring of the motor has run down. To the opposite end of the shaft S is a ratchetwheel T, normally held in position by a spring-pawl t, secured at one end to the plate A. Pivotally mounted on the shaft S adjacent the ratchet-wheel T is the arm 2?, normally held in position by the spring 25 connected to the plateA. Pivoted on arm 6 are the oppositely-facingspringheld pawls u a, which when the arm 6 is in its normal central position are both held out of contact with the ratchet-wheel T by means of pins 10 16 secured to the plate A.- If, however, the ratchet-arm t is forced to one side, one of the balls 14 or u will be forced by its spring into contact with the ratchet-wheel, which in turn will be forced ahead in that direction, sliding beneath the retaining springpawl t. Mounted on the shaft Bis a gear W, which operates a second gear W, pivoted to the plate A adjacent the ratchet-arm t. Secured to the gear W is a lug 20, which when the motor is wound is adapted to strike the ratchet-arm t on the side at each revolution, and thereby advance the ratchet-wheel T and indicator S one notch at a time, during which operation said gear revolves in the direction of the arrow as. The gear F (shown in dotted lines in Fig. 5) is provided with a stud w, which as the motor is unwound is adapted to strike the ratchet-arm 2/" upon the opposite side at each revolution and to force the ratchet-wheel T and indicator S in the opposite direction one notch at a time. It will be observed that when the motor is unwound the stud to will strike the ratchet-arm 25 upon the end instead of on the side and will therefore produce no effect upon the ratchet-wheel T. This is also the case with the projection w when the motor is Wound. By this means the user of the motor can see at a glance the extent to which the motor is unwound and can readily tell when it becomes necessaryv to rewind the same. By providing the pawl-andratchet drive with the indicator rotating with the motor-shaft it is possible to slowly operate the indicator without necessitating the employment of a long train of gears. This mechanism is therefore particularly applicablle to rapidly-operating spring-motors of this 0 ass.

It is obvious that the details of structure may be varied by the skilled mechanic without departure from the essentials of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In spring-motors, the combination with an indicating-scale and pointer, a ratchetwheel for effecting the relative movement of the same, a pair of oppositely-facing pawls for operating said ratchet-wheel in either direction, an arm carrying said pawls, a driveshaft, an operating-spring therefor, means for winding said spring, and tappets actuated by said shaft for actuating said pawls.

2. In spring-motors, the combination of an indicating-scale and pointer, a ratchet-wheel for effecting the relative movement of the same, a spring-held arm on the shaft of said ratchet-wheel, oppositely-facing pawls on said arm, a drive-shaft, an operating-spring connected thereto, means connected to said shaft for winding said spring, gears operati ely connected to said shaft and tappets on said gears for engaging said arm to operate the ratchetwheel in either direction.

3. In spring-motors, the combination of a drive-shaft, an operating-spring therefor, a governor-shaft geared to said drive-shaft, a fixed annular flange having an internal friction-surface surrounding said governor-shaft,

'a disk secured to said governor-shaft, centrifugally-actuated arms pivoted to said disk, shoes on said arms adapted to engage said friction-surface, tension-springs connected to said arms and to bell-crank levers mounted on said disk, an adjustable cone-surface mounted to slide longitudinally on said shaft and engaging said bell-crank levers, and means for shifting said cone while the motor is in operation, whereby the tension of said springs may be adjusted.

' t. In spring-motors, the combination of a drive-shaft, an operating-spring therefor, a governor-shaft geared to said drive-shaft, a fixed annular friction-surface, centrifugallyactuated arms connected to said governorshaft and having friction-shoes adapted to engage said surface, springs extending between said arms and an adjusting device mounted to slide longitudinally upon said governor-shaft and means independent of said friction-surface for varying the position of said adjusting devices while the motor is in operation to vary the tension of said springs.

CHARLES E. YETMAN.

Witnesses;

F. A. RAsBAoH, IRVING E. RICHARDSON. 

